Rotary engine.



N. H. MOTSINGER ROTARY ENGINE. APPLICATION FILED mns, 190s. RENEWED 111:0. zo, 1909.

Patented June 7, 1910.

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IJ' r..../ v! f 1 v N. H. MOTSINGER. ROTARY ENGINE. APPLICATION FILED MAR. 5, 190s. RBNEWED DB0. zo, 1909.

960,993 Patented June 7,1910.

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UNITED vSTATES PATENT onirica;

NnWnL-L H.- MorsrNGnn, or GREENsiURG, rniiiirsYLvAiim ROTARY ENGINE.

Specication of Letters `Iatent.- .f Patented June 7, 1910.

Application led March l5, 1906, Serial No. 804,412. Renewed December 20, 1909. Serial No. 534,172.

To all whom 'itmoy concern:

Be it known that I, NEWELL H. Mo'rsiNeER,-a citizen ofthe United States, resid- Y ing-'at Greensburg, in the county of lVestmoreland and State of Pennsylvania, have -invented'certain new and useful Improvements in Rotary Engines, of whichthe following is a specification;

My said invention consists in certain improvementsin the details of'uconstruct-ion of that class ofrotary.engines illustrated in my Patent No. 726,969 of May 5, 1903,

whereby the' operation 'thereof is rendered' more eicient and economicaland its construction more perfect for the purposes designed, 4all `as will be hereinafter -niore fully described andl claimed.

Referring-to the accompan iner drawings which aremade a part hereo 4and' on which similar reference characters indicate similar parts, Figure l is an axial section through a'n engineof my improved construction, Fig. `2 a. cross-section on the dotted -line 2 -2 in 1, Fig. 3 a cross-section on the dotted line 3-3 in Fig. 1,-the position of the cyl- 'inders being varied to illustrate the relative positions of the vanes nd grooves at the point of engagement, Fig. 4 a detail cross-section similar to a portion of Fig. 2

showing thevalve in exhaust position, and Fi 5 a detail cross-section showing a modifie `constructionfof the valve.

In said drawings the portions marked, A Vrepresent the main .body or casing of the engine, Band C a pair of co-acting cylinders, D thevalve for controlling the inlet and exhaust ports, .and E an oil reservoir. The casing A isa casting of substantially' the form in cross section best shown in l1`igs. 2 and 3, and lpreferably consists of vtwo diiplicate parts abutting, as'shown in Fig. 1, and secured together by circumferential flan es on their adjacent ends and 'clamping olts a extending through `perfoi'atons in rsaid ffianges, the abutting faces of said sections'beingplaned or'ground truc to providel a steam ti htjoint. `Said easing is provided with l ges a upon which it may trances to which are located side by side and close together and communicate with the valve chamber, while their discharge ends communicate with the chamber in which cylinder B -is mounted and at different points around one side of its circumference, preferably about equal distances apart,

as shown,

An exhaust port 4 at each end `leads from the opposite side of said chamber through said casing to the opposite side of the valve chamber. This arrangement shown in Fig. 2 and'is the saine at both ends of the engine. in the center of the' casing4 i'i ,substantially the same :is at each en d, except that they are reversed, the inlet ports 5.6 and 7 (shown in Fig. 3) leading into theopposite side of the chamber of cylinder B, while the exhaust port 8 leads from the op osite side of said chamber. The correspon ing center ports of each section .come together and vJoin each other at th'e center forming prac- .tically single )orts of double the capacityof each, as in icatcd by dotted lines in 'Fig 1. The chambeis for the cylinders Band C are formed with theirinterior surfacesfcrue circles in cross section and the circle of one cuts into the circle of the other, as shown, so that the pcripheries of said cylinders'may contact 'lhc opening between said chambers is thus bounded on opposite sides by 'sharp angles ll in the casing. The lower edge of each inlet port land 5 isvthat distance above said angle or point 11 that the is clearly The arrangement of ports grooves in the cylinder C will pass under said .point an'd be closed before the port is opened lo admit the fluidprcssure and thus guard against said fluid passing into said gi'o0\e. The entrances to exhaust oits 4 :ind 8 are also located u sufficient istance above point ll on the other side so that the groove shall have. passed beyond the conta-ct between thc'cyliiidcis 'before it isopened, thus guarding against exhaust steam passing into 'said grooves and .throughthemto the live steam chambers.

' The cylinder B is foi-ined in twosections secured rigidly to thc shaft B by `means of splines L and transverse pins -bl which extcndthrough said sections and siiidshaft.

Euch section is formed with spiral vznicsbt,

there being preferably1 two of said vaiies, starting at diainetrica ly opposite points-oil the cylinder on-ea'ch section and ruiming in a spiral direction at an angleof forty-five degrees from one end of' each section to the other. The vanes upon. one end run in a right-hand direction while Athose upon the other section run in a left-hand direction, as shown in Fig. 1, the-ends of thecorresponding varies of the twosections meetin and joining in the center of the cylinder. acking strips b3 .may be provided in the faces of said vanes, as shown in Figs. 3 and 4, said strips being T -shaped in cross section and mounted in correspondingly shaped grooves in said vanes and normally held outwardly by `springs b mounted in the bottom of said grooves beneath said packing strips. By this means, a tight fit between said vanes and the interior of the chamber in which cylinder B is mounted, may be insured. Each of said vanes b3 at its base and sides is of the particular form described in my above mentioned Letters Patent, but the outer face of each of said vanes is formed curved on a line coincident with the interior surface of the chamber and said surface is cut on each side to an axial line at that point where the advancing side of the vane 1n the rotation of the cylinders leaves its close contact with the advancing side of the groove, which point is illustrated in Fig. 3. The advanta' e of this particular form will be presently escribed.

'Lhe cylinder C is formed in two sections secured to shaft Cf by splines c land pins 0 in a similar manner as are the sections composing cylinder B. Each of said sections is provided with spiral grooves c2 formed to receive and co-act with the spiral varies b2 upon the cylinder B. The sides of said grooves are ofA a curve to correspond with and closely fit to the Sides of said vaiies when in mesh therewith but they extend into the cylinder to meet on the lines of said curvature, thus providing apocket between the bottom of each groove and the outer face of the vane therein, when in mesh with each other, as best shown in Fig. 3.

The valve D is a hollow cylinder mounted in the valve chamber in the top of casing A. and adapted to rotate therein. At one end it projects into an extension of said chamber in head A2 and is formed with a series of radial openings which communicate with an inlet pipe D" through which steam or other motive fluid is admitted to the interior of said valve. At each end it is formed with a valve section d extending around about two-thirds of its circumference, as shown in Fig. 3, and-having a fan-shaped port df therethrough. In its middle is another sim ilar valve section dz, on its opposite side, having a fanlshaped port (la tierethrough. Between the lvalve sections d and di the exterior of said valve D is cored out, forming an exhaust chamber within the valve chamber and surrounding said valve from end to end. Exhaust pipes D 2 lead from said chamber to conduct away the exhaust. A; o erating lever Ds is mountedupon one oi t e journals d* of said' valve.

An oilv reservoir E su plied through a supply pipe e, is preferab y mounted upon the top o the casing A andI branch pipes e', e, e and e4 lead therefrom through the sides of the chamber containing the cylinder C to discharge within said chamber at each end and the center thereof. l

In Fig. 5, I have shown the valve composedof a cylinder D with the valve section ormed as a separate part da mounted thereon, the (ports and cored out portions being arrange inthe same .manner as when formed Vin one piece but adapted to be adjusted circumferentially on said cy1inder.Da by means of a set screw d". By thls arrangement, as will be readily understood, the time of opening and closing the ports and theextent to which they are opened and closed miy be regulated to suit the work.

` n operation, the steam, or other motive Huid, being turnedon bymeans of the operating lever D, and the parts being in the position shown in Fig. 2, said fluid will..

come into the ports 1, 2 and 3 behind the vane b and by impact and expansive force against the rear edge of said vane, will operate to drive said cylinder B in the direction indicated by the arrow. As shownby the dotted lines, 'the mouths of the'several inlet ports are formed on an angle equal to the angle of the spiral vanes so that as each vane passes over each port it o ens for its full width parallel with the e ge of said vane. In Fig. 2, the vane b2 on the righthand side of cylinder B is shown in position with the lower ed e of port 1 just opening, the dotted line in icating the lower edge ot said port, which -is parallel with the rear edge of said vane. ,Cylinder C is in a position where the rear corner 10 of the roove has just passed under the angle 11, efore described. The steam, or other motive uid, coming from port 1 thus dischargesinto a narrow chamber formed between the solid surfaces of the casingthe cylinders B and C `and the rear edge of vane b2, all leakage into the'groove c2 being prevented by the mouth of said oove havin passed entirely under said anle 11 of sai casing, this result being ma e possible by the vane beifY cut to the line where it separates from said groove, as shown at the left in Fig. 3 and this line being where they meet the point 1L of the casing. By this arrangement 'the entire expansive and impact force of steam, or other fluid is directed against the rear side of vane b2 to drive thee linder forward. The chamber into wliic the steam is received is somewhat diamond shaped iu cross section and the varies bein spiral it runs to a oint at its front en which is closed by t e rear edge of the groove the im..- ....,.A ....i.

of the section of the cylinder until it suddenlyopens into the exhaust ports 8 and the -spent steam is discharged 'throu h exhaustv By having a multiplicity of inlet pipes D2. ports, arranged to discharge into the chamber of cylinder B at different points the supply of steam is prevented from being cut off from the 'chamber behind one vane by thcfollowing vane at any point, which is important as. by this means, live steam may be sup lied at all points behind each vane. ll'hile two ports or only a single port maybe found suiicient under seine conditions, and

' fluid between the vanes.

apart are of great advantage.

the valve D may be adjusted to use only the number of ports the conditions of the work require, when the engine is under a heavy load or great speed is required the three ports arranged Substantially By reference to Fig. '-l, which shows the same position of ports as shown in Fig. 2 except that the valve is'turiied to open the cshaust 'ports as when the enffine is reversed, asv shown in Fig. 3, it will llie seen that the inlet ports also scrveas auxiliary exhaust ports and thus prevent any compressing ofexhaust Then it. is desired to reverse the engine the valve is shifted to open the ports 5, 6 and 7 as indicated in Fig. 3 (or any part of them) when the steam is admitted through .said ports and cxhausted through exhaust port 4, and the -then auxiliaryexhaust ports l, 2 and 3,

which a're thus opened, as show'n in Fig. 4.

The oil reservoir E is mounted on casing A. and supplied with oil through pipe e, from any source, and said oil is fed tlirou rli` the several branch pipes', e2, 03,15*, to t ie chamber of the cylinder C and is taken into the grooves c2 of said cylinder and thus forms an oil acking in the pocket between the bottom'of said grooves and the crown of the varies b2. Said oil .flows through said grooves from the center toward each end when the engine is operating in one direction and f rom the endsV to the center when operating inthe other direction, the rotar action of the cylinder serving to keep the oil in circulation through the pipes, reservoirs andA grooves. Oil ports r1.5 vlead from within said cylinder cach way to the bcarino's for the journals'B and B in the heads A and A2 in the casinff. Said journals are thus lubricated and al wearing parts of `the surface of the cylinders kept thoroughly equi-distant Atact, said vaines'V being o Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, isz- E 1. In a rotary engine, the combination of liiidrical chambers of different diameters, a

mounted in said chambers with theirsurfaces iii longitudinal Contact, one ofsa'id cylinders -being formed with spiral .varies and the other with grooves, said grooves and varies runnin from a divisifonalgpoint,to-

inders of uniform diameters with co-acti'ng in said casing with their eripheries inconf) a form on their edges to fit snugly, iii said grooves when in mesh and with'their faces on the line where ytheir. advancing sides separate during rotation from the advance corner ofsaid grooves, substantially as set forth.'

`,the` casing containing cylindricalchambers,

the lcircles of the interior of twoof which cut into each other forming inwardlygpro- Ajecting points 11 between them, a, pair of may be closed by said easinfr .beforethe stantially as set forth.

the casing having cylindrical -chambers formed therein, and formed with multiple tlie other, said inlet ports being4 arrangedpto discharge into the cylinder chamber at ,dif-

ferent circumferential points around .one side, a rotary valve for controllinghsaid inlet and exhaust ports mounted in t e charnber at the top of said casing, and a pair of cylinders with inter-meshing grooves and vanes mounted in chambers in said'icasing as set forth.

5. In a rotary engine, the combination of the casing containing a plurality of cylindrical lchambers, two of which -cut into each other longitudinally, a rotary cylinder the casing containing communicating cyl' ward each en( of the respective cylinders in` opposite directions and formed to fit snugly 2. In a rotary engine, thelcoinbinatioiiibf to separate at the ang ell in the casingbetween the cylinders, whereby. said groove.

4. Ina rotary engine, theombinat-ion of;

with their surfaces in contacthsubstantially pair of cylinders of uniform diameters.,

soi

grooves and varies formed thereon mounted.

t, 3. In a rotary engine, the combination .of I' V inlet ports on one side and exhaust ports on I mounted in each of said chambers with their peripheries 1n longltudinal contact, one of said cylinders being formed with spiralvanes and the other with spiral grooves, said venes and grooves being formed to intermesh, the grooves being formed to it said Yanes snugly at their sides but of greater depth than the height of said vanes, whereby a pocket is formed to receive and hold the crown of said vanes, and the valve for controlling the inlet and exhaust ports, substantially a's set forth. l

`G. A Arotary engine comprising a casing containing two coacting cylinders with inter-meshin vanes and grooves, the vanes being forme with sides curved to correspond with the curvature lof the'sides of said grooves and with outer faces curved in cross section to coincide with the inner circumference of the chambers in which the cylinder is mounted, substantially as'set forth.

7. In a rotary engine, the combination of the casingformed withl cylindrical hambers, a pair of coacting cylinders mounted in said chambers one formed with grooves and the other with spiral vanes meshing therewith, each of said cylinders being formed in two sections abutting at the fhaust ports at each en single ports,

spiral Witnesses:

center and the grooves end vanes on one section running 1n a r1ghthand direction and on the other section 1n a left-hand; dlrectlon and meeting in the center of said cylinder, substantially as set forth.

8. In a rotary engine, the combination of the ,casing formed 1n two sections, secured together at the center havin inlet and exd of eac section, those in the abutting endsmeeting and forming a .pair of cylinders mounted iu chambers in said casing, each formed in two sections with spiral grooves on one and spiral. vanes 011 the other,` eaeh section of each cylinder having its grooves or vanes running in one direction and in the opposite direction on the other section, and the vaines and grooves meeting in the center of the respective cylinders, substantially as set forth.

In witness whereof, I, have hereunto set my hand and seal at Vashington, D. C., this 2nd day of March, A. D. nineteen hundred and six.

NEWELL n. MOTSINGER. [a 9.]

E. NV. BRADFORD, FRANK C. HALL. 

